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From "Martin Seitz (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-456) Duplicate hits and missing hits in sorted search
Date Mon, 17 Oct 2005 06:18:44 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-456?page=all ]

Martin Seitz updated LUCENE-456:
--------------------------------

    Attachment: TestCustomSearcherSort_1_4_3.java

The test case for Lucene 1.4.3.

> Duplicate hits and missing hits in sorted search
> ------------------------------------------------
>
>          Key: LUCENE-456
>          URL: http://issues.apache.org/jira/browse/LUCENE-456
>      Project: Lucene - Java
>         Type: Bug
>   Components: Search
>     Versions: 1.4
>  Environment: JDK 1.4.2_06, probably OS independant, testet on Solaris 8 and Win2000
>     Reporter: Martin Seitz
>     Priority: Minor
>  Attachments: TestCustomSearcherSort_1_4_3.java
>
> If using a searcher that subclasses from IndexSearcher I get different result sets (besides
the ordering of course). The problem only occurrs if the searcher is wrapped by (Parallel)MultiSearcher
and the index is not too small. The number of hits returned by un unsorted and a sorted search
are identical but the hits are referencing different documents. A closer look at the result
sets revealed that the sorted search returns duplicate hits.
> I created test cases for Lucene 1.4.3 as well as for the head release. The problem showed
up for both, the number of duplicates beeing bigger for the head realease. The test cases
are written for package org.apache.lucene.search. There are messages describing the problem
written to the console. In order to see all those hints the asserts are commented out. So
dont't be confused if junit reports no errors. (Sorry, beeing a novice user of the bug tracker
I don't see any means to attach the test cases on this screen. Let's see.)

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